US20070144649A1 - Overlay configuration for a tire - Google Patents
Overlay configuration for a tire Download PDFInfo
- Publication number
- US20070144649A1 US20070144649A1 US11/580,772 US58077206A US2007144649A1 US 20070144649 A1 US20070144649 A1 US 20070144649A1 US 58077206 A US58077206 A US 58077206A US 2007144649 A1 US2007144649 A1 US 2007144649A1
- Authority
- US
- United States
- Prior art keywords
- tire
- strip
- belt
- carcass
- cords
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C9/00—Reinforcements or ply arrangement of pneumatic tyres
- B60C9/18—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers
- B60C9/20—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers built-up from rubberised plies each having all cords arranged substantially parallel
- B60C9/22—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers built-up from rubberised plies each having all cords arranged substantially parallel the plies being arranged with all cords disposed along the circumference of the tyre
- B60C9/2204—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers built-up from rubberised plies each having all cords arranged substantially parallel the plies being arranged with all cords disposed along the circumference of the tyre obtained by circumferentially narrow strip winding
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T152/00—Resilient tires and wheels
- Y10T152/10—Tires, resilient
- Y10T152/10495—Pneumatic tire or inner tube
- Y10T152/10765—Characterized by belt or breaker structure
- Y10T152/10783—Reinforcing plies made up from wound narrow ribbons
Definitions
- the invention relates to radial tires, and more particularly to tires having overlays.
- Radial tires are generally constructed with a breaker or belt interposed in the crown region of the carcass, such belt being composed of one or more layers or plies of tire cords which are generally inextensible and are made from such material as metallic wires, glass fibers, rayon, etc.
- the cords In a mono-ply belt, the cords have a low bias angle of approximately 0°, i.e., they are oriented substantially parallel to the planes of the beads and to the median equatorial plane or crown center line of the tire.
- the belt is of a multi-ply construction, similar but opposed low bias orientations of the cords or cables generally at angles ranging up to approximately 30° with respect to the median equatorial planes of the tire are employed in successive plies.
- FIG. 1 is a cross-sectional view of a tire of the present invention
- FIG. 2 is a close-up cross-sectional view of a portion of the shoulder assembly of the tire of FIG. 1 ;
- FIG. 3 is a cross-sectional view of the overlay layer of the tire only.
- the tire 10 comprises a pair of annular beads 11 and 13 with a radial carcass ply 12 extending from one bead 11 to the other bead 13 .
- the cords of the carcass ply are substantially parallel to each other and extend from bead to bead so as to make an angle with the mid-circumferential plane M-M of between 80 and 90 degrees.
- the cords of the carcass ply can be made of any suitable material such as rayon, steel, polyester, polyamide, or aromatic polyamide.
- the crown area of the tire carcass 15 is reinforced by a belt assembly formed from one or more belt plies 6 , 7 , each belt ply comprised of an elastomeric reinforced layer, typically reinforced by steel cords or cords made of any suitable material such as aromatic polyamide, glass fiber, PVA, carbon fiber or rayon.
- the tire further includes a tread 5 overlying the crown region of the carcass 2 and adjoining the side walls 3 at their radially outwardmost region.
- the two belt plies 6 and 7 are of different widths in the direction of the tire axis, with the widest ply 7 typically having a width corresponding to the width of the tread 5 .
- these plies 6 and 7 may both be made of equal width.
- the cord elements forming each of the plies 6 and 7 are oriented parallel to one another.
- the plies 6 and 7 are generally symmetrically oriented at respective equal but opposite bias angles to the median equatorial plane X-X′.
- the tire further includes an overlay or cap ply 8 which is superimposed on the radially outwardmost belt ply 6 in direct contact with belt ply 6 .
- the cap ply 8 is formed from a helically or spirally wound strip made from an elastomeric material reinforced by cords.
- the strip typically comprises a rubberized strip of two or more cords.
- Preferably the strip width is in the range of about 0.5 inches to about 1 inch.
- the strip coverage area extends past the ends of the widest belt, typically on the order of about 0-3 mm.
- the strip is wound using a half pitch dwell. In other words, for every revolution of the tire building drum, the strip application head pitch is about 25 mm.
- the pitch is decreased to 12.5 mm or “half-pitch”.
- the strips are applied on an angular stacked orientation wherein the strips overlap, as shown in FIG. 3 .
- the strips overlap in such a manner that half width of a first strip mate with the half width of an adjacent strip.
- the strips When laid up in such a manner, the strips essentially form a double row of strip at the shoulder area. At each end of the overlay, the strips are laid up in a double row.
- the strips are laid adjacent one another in a single row.
- each strip with respect to the equatorial plane of the tire is on the order of about 0 to about 5 degrees.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Tires In General (AREA)
Abstract
A tire comprising a tread portion and a pair of sidewalls wherein the sidewalls are connected to the tread portion by shoulder regions, and wherein the tire further includes one or more strips of rubber affixed to the inner surface of a green tire. The strip may be annular and may be located near the toe of the bead. The strip is made from a rubber composition having a specific gravity greater than 2. The strip may be ground away as desired in order to balance the tire without the need for weights.
Description
- This application claims the benefit of, and incorporates by reference, U.S. Provisional Application No. 60/754,150 filed Dec. 27, 2005.
- The invention relates to radial tires, and more particularly to tires having overlays.
- Radial tires are generally constructed with a breaker or belt interposed in the crown region of the carcass, such belt being composed of one or more layers or plies of tire cords which are generally inextensible and are made from such material as metallic wires, glass fibers, rayon, etc. In a mono-ply belt, the cords have a low bias angle of approximately 0°, i.e., they are oriented substantially parallel to the planes of the beads and to the median equatorial plane or crown center line of the tire. If the belt is of a multi-ply construction, similar but opposed low bias orientations of the cords or cables generally at angles ranging up to approximately 30° with respect to the median equatorial planes of the tire are employed in successive plies.
- It is known in the art to provide an additional cover or cap ply of textile cords overlying the belt. The use of a cap ply endows a tire with additional travel comfort and safety, superior rolling resistance and in general improves the high speed characteristics of tires. The cap ply protects the metallic cords of the belt against the effects of humidity and reduces ply separation in the belt edges at elevated speeds.
- One problem with manufacturing an overlay of cap plys is that it can be difficult to provide uniform coverage where the overlay covers the all the belt and the shoulder area. Thus an improved way of manufacturing a full width overlay is desired.
- The invention will be described by way of example and with reference to the accompanying drawings in which:
-
FIG. 1 is a cross-sectional view of a tire of the present invention; -
FIG. 2 is a close-up cross-sectional view of a portion of the shoulder assembly of the tire ofFIG. 1 ; and -
FIG. 3 is a cross-sectional view of the overlay layer of the tire only. - Referring now to
FIG. 1 , a radial tire 1 according to the present invention is shown. Thetire 10 comprises a pair ofannular beads bead 11 to theother bead 13. The cords of the carcass ply are substantially parallel to each other and extend from bead to bead so as to make an angle with the mid-circumferential plane M-M of between 80 and 90 degrees. The cords of the carcass ply can be made of any suitable material such as rayon, steel, polyester, polyamide, or aromatic polyamide. - The crown area of the
tire carcass 15 is reinforced by a belt assembly formed from one ormore belt plies - The tire further includes a
tread 5 overlying the crown region of the carcass 2 and adjoining theside walls 3 at their radially outwardmost region. - As shown in
FIG. 1 , the twobelt plies widest ply 7 typically having a width corresponding to the width of thetread 5. Alternatively, theseplies plies plies - The tire further includes an overlay or
cap ply 8 which is superimposed on the radiallyoutwardmost belt ply 6 in direct contact withbelt ply 6. Thecap ply 8 is formed from a helically or spirally wound strip made from an elastomeric material reinforced by cords. The strip typically comprises a rubberized strip of two or more cords. Preferably the strip width is in the range of about 0.5 inches to about 1 inch. The strip coverage area extends past the ends of the widest belt, typically on the order of about 0-3 mm. On each shoulder area of the belt package, the strip is wound using a half pitch dwell. In other words, for every revolution of the tire building drum, the strip application head pitch is about 25 mm. In this particular shoulder area, the pitch is decreased to 12.5 mm or “half-pitch”. So in the shoulder area, the strips are applied on an angular stacked orientation wherein the strips overlap, as shown inFIG. 3 . Preferably the strips overlap in such a manner that half width of a first strip mate with the half width of an adjacent strip. When laid up in such a manner, the strips essentially form a double row of strip at the shoulder area. At each end of the overlay, the strips are laid up in a double row. - Near the center or midplane portion of the tire, the strips are laid adjacent one another in a single row.
- The orientation of each strip with respect to the equatorial plane of the tire is on the order of about 0 to about 5 degrees.
- Variations in the present invention are possible in light of the description of it provided herein. While certain representative embodiments and details have been shown for the purpose of illustrating the subject invention, it will be apparent to those skilled in this art that various changes and modifications can be made therein without departing from the scope of the subject invention. It is, therefore, to be understood that changes can be made in the particular embodiments described which will be within the full intended scope of the invention as defined by the following appended claims.
Claims (1)
1. A pneumatic tire comprising a radial ply carcass, a tread disposed radially outward of the crown region of the carcass, and a crown reinforcing structure interposed between the tread portion and the crown region of the carcass, wherein the crown reinforcing structure comprises a belt assembly having one or more belt ply, wherein said one or more belt plies comprise reinforcement cords, and an overlay structure extending transversely over the belt plies, the overlay comprised of an elastomeric strip of two or more cords, the elastomeric strip making an angle of between 0 and 5 degrees with the equitorial plane of the tire, wherein the tire further comprises a shoulder area, and wherein the elastomeric strip is wound in the shoulder area in an overlapping manner and each strip overlaps the adjacent strip by the strip width/2.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/580,772 US20070144649A1 (en) | 2005-12-27 | 2006-10-13 | Overlay configuration for a tire |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US75415005P | 2005-12-27 | 2005-12-27 | |
US11/580,772 US20070144649A1 (en) | 2005-12-27 | 2006-10-13 | Overlay configuration for a tire |
Publications (1)
Publication Number | Publication Date |
---|---|
US20070144649A1 true US20070144649A1 (en) | 2007-06-28 |
Family
ID=38192222
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/580,772 Abandoned US20070144649A1 (en) | 2005-12-27 | 2006-10-13 | Overlay configuration for a tire |
Country Status (1)
Country | Link |
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US (1) | US20070144649A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8290238B2 (en) | 2004-06-09 | 2012-10-16 | Cognex Technology And Investment Corporation | Method and apparatus for locating objects |
US20130118670A1 (en) * | 2011-11-16 | 2013-05-16 | Robert Edward Lionetti | Pneumatic tire with tackified wrapped reinforcement |
EP3069863A1 (en) * | 2015-03-16 | 2016-09-21 | Continental Reifen Deutschland GmbH | Method for manufacturing vehicle tyres |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5014762A (en) * | 1989-05-26 | 1991-05-14 | The Goodyear Tire & Rubber Company | Angled overlay belt for tires |
US5431209A (en) * | 1991-06-26 | 1995-07-11 | Sumitomo Rubber Industries, Ltd. | Passenger tire with low bead apex volume |
US6799618B2 (en) * | 2002-12-18 | 2004-10-05 | The Goodyear Tire & Rubber Company | Pneumatic tire having an overlay reinforcement |
US6935393B2 (en) * | 2003-10-23 | 2005-08-30 | The Goodyear Tire & Rubber Company | Tire having an overlay for noise improvement |
-
2006
- 2006-10-13 US US11/580,772 patent/US20070144649A1/en not_active Abandoned
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5014762A (en) * | 1989-05-26 | 1991-05-14 | The Goodyear Tire & Rubber Company | Angled overlay belt for tires |
US5431209A (en) * | 1991-06-26 | 1995-07-11 | Sumitomo Rubber Industries, Ltd. | Passenger tire with low bead apex volume |
US6799618B2 (en) * | 2002-12-18 | 2004-10-05 | The Goodyear Tire & Rubber Company | Pneumatic tire having an overlay reinforcement |
US6935393B2 (en) * | 2003-10-23 | 2005-08-30 | The Goodyear Tire & Rubber Company | Tire having an overlay for noise improvement |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8290238B2 (en) | 2004-06-09 | 2012-10-16 | Cognex Technology And Investment Corporation | Method and apparatus for locating objects |
US20130118670A1 (en) * | 2011-11-16 | 2013-05-16 | Robert Edward Lionetti | Pneumatic tire with tackified wrapped reinforcement |
CN103112318A (en) * | 2011-11-16 | 2013-05-22 | 固特异轮胎和橡胶公司 | Pneumatic tire and method of manufacturing a pneumatic tire |
EP3069863A1 (en) * | 2015-03-16 | 2016-09-21 | Continental Reifen Deutschland GmbH | Method for manufacturing vehicle tyres |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |